The invention relates to the technical field of kitchen utensils for cooking foods in steam, and discloses a steam food processor which comprises a lid, a pot, a spray nozzle, a base, control circuits and a water and steam separation tank.A water tank, a water pump and a steam generator which are sequentially communicated with one another are arranged in the base; the water and steam separation tank comprises a tank, the tank is provided with a water inlet, a water outlet, a steam outlet and a steam inlet pipe, the water inlet is communicated with a water outlet end of the water pump, the water outlet is communicated with a water inlet end of the steam generator, the steam inlet pipe is communicated with a steam outlet end of the steam generator, the steam outlet is communicated with the spray nozzle, and steam can flow into the pot after being ejected from the spray nozzle.The steam food processor has the advantages that water and the steam can be separated from each other when the steam flows through the water and steam separation tank, accordingly, the steam which flows into the pot only contains a small quantity of water, and the steam food processor is high in heating efficiency; the water in the water and steam separation tank can be preheated, preheated water flows back into the steam generator, and accordingly the steam outlet speed further can be increased; the water and the steam are separated from each other, and accordingly noise generation can be reduced advantageously.